Please use this identifier to cite or link to this item:
|Title:||Thin film composite forward-osmosis membranes with enhanced internal osmotic pressure for internal concentration polarization reduction|
Sulfonated polymeric membrane
|Citation:||Zhou, Z., Lee, J.Y., Chung, T.-S. (2014-08-01). Thin film composite forward-osmosis membranes with enhanced internal osmotic pressure for internal concentration polarization reduction. Chemical Engineering Journal 249 : 236-245. ScholarBank@NUS Repository. https://doi.org/10.1016/j.cej.2014.03.049|
|Abstract:||Thin-film composite (TFC) forward-osmosis (FO) membranes with enhanced internal osmotic pressure (IOP) were used to reduce internal concentration polarization in this study. These TFC membranes contained a selective polyamide layer deposited by interfacial polymerization on a support substrate cast from a polymer blend of polysulfone (PSf) and sulfonated poly(phenylene oxide) (SPPO). The immobilized counter ions (Na+) in SPPO gave rise to an IOP which facilitated water transport in the AL-FS operating mode (i.e., the active layer is facing the feed solution, also referred to as the FO mode) but retarded water transport in the AL-DS operating mode (i.e., the active layer is facing the draw solution, also called as the pressure retarded osmosis (PRO) mode). An optimized TFC membrane could draw a water flux of 39 LMH (Lm-2h-1) in the AL-FS mode, which is among the highest in the current literature; and 57 LMH in the AL-DS mode, which is comparable to other published works using deionized water as the feed and 2M NaCl as the draw solution. The optimized SPPO/PSf TFC membrane also outperformed other published FO membranes in simulated seawater desalination. Extremely high water fluxes of 25 and 19 LMH could be obtained in the AL-DS and AL-FS modes respectively. The impressive high water flux in the AL-FS mode makes this membrane particularly suitable for FO operations where internal concentration polarization (ICP) and membrane fouling are major concerns. © 2014 Elsevier B.V.|
|Source Title:||Chemical Engineering Journal|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jan 15, 2019
WEB OF SCIENCETM
checked on Jan 15, 2019
checked on Dec 14, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.